Recently, the Cassini spacecraft in outer space to shoot down an extremely precious photos. In this picture, we can also see Tethys, Hyperion, Prometheus these three shadows of Saturn’s moons.
Recently, the Cassini spacecraft in outer space to shoot down an extremely precious photos. In this picture, we can also see Tethys, Hyperion, Prometheus these three shadows of Saturn’s moons. Tethys is Casey found in 1684 in Virginia, which is one of the largest satellite of Saturn, its diameter of 1062 km, is the 16th largest among solar system satellites.
Tethys oval-shaped, it has two very different hemispheres, one hemisphere looks dull, the surface looks bumpy, then another hemisphere looks brighter, smoother surface. It is reported that the satellite is mainly composed of ice, its density value (0.98g / cm 3;?) Seems to be good evidence of this. Tethys in this picture CKS benefits in the middle.
In the top left of Tethys has a tiny satellite, it is Hyperion. Compared Tethys, Hyperion seems a lot smaller. It is reported that its diameter is only 270 km. Astronomers believe that the high porosity and low density is caused by a major cause of extremely irregular shape Fengyun satellites can rotate. Another reason is another satellite –Titan Saturn for Hyperion created an irregular orbit resonance.
Prometheus appears forefront is in the photo. If Hyperion metaphor ordinary potatoes, then Prometheus is equivalent Kipfler potatoes – thin, choppy surface.